<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <button id="connect">链接</button>
  <button id="send" disabled>发送数据</button> <br>
  从服务端接收的数据如下: <br>
  <span id="rec"></span>
  <script>
    const connect = document.getElementById("connect")
    const send = document.getElementById("send")
    const rec = document.getElementById("rec")
    let ws = null
    connect.onclick = function() {
      ws = new WebSocket('ws://localhost:9998')
      ws.onopen = () => {
        console.log('连接成功');
        send.disabled = false
      }
      ws.onclose = () => {
        console.log('连接服务器失败');
      }
      ws.onmessage = msg => {
        console.log('接收到数据了');
        console.log(msg);
        rec.innerHTML = msg.data
      }
    }
    send.onclick = function() {
      ws.send(JSON.stringify({
        action: 'fullScreen',
        socketType: 'fullScreen',
        chartName:'trend',
        value: true
      }))
    }
  </script>
</body>
</html>